Friends I m here.i always love symphony.all products of symphony as well as good.i bought smyphony air cooler last year n till now its working very well.cools my room very quickly.service quality Is also good.bt company service bit little costly.bt that’s jst one negative point.otherwise its good.it does not produce any sound.satisfied with this product .cooling very fast n low power consumption .very affordable price.all features are good.it shows water level that’s very important.good product for quickly cooling room .thanks symphony